Minnie Driver has cut all ties with charity Oxfam, stepping down as its global ambassador.

The actress has said she's "nothing short of horrified" by the allegations against Oxfam International.

Minnie, 48, has worked with the charity for 20 years, even donating a £72,000 lunch date to its Ebay auction back in 2008.

But following the sex scandal allegations the charity is facing, the Good Will Hunting star was withdrawn her support.

The star said: "I am nothing short of horrified by the allegations against Oxfam International."

Minnie has cut ties with the charity (Image: Splash News)

She's worked with them for 20 years (Image: Getty Images Europe)

She added to The Telegraph : "In no uncertain terms do I plan to continue my support of this organisation or its leaders.

"And though it is unfortunate that after 20 years I am no longer able to advocate and defend through this specific framework, social and economic injustice is more globally prevalent than ever."

She went on to say that she won't let the "abhorrent mistakes of a troubling organisation" stop her "working with good people in this space to support a population of human beings around the world that needs our help".

In a statement, Oxfam chiefs said they were saddened by Minnie's decision.

They told MailOnline : "Minnie Driver has been a devoted Oxfam supporter for many years, and we are grateful for her commitment to ending global poverty.

"In no uncertain terms do I plan to continue my support of this organisation or its leaders." (Image: Press Association)

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"Her decision to step down as an Oxfam Ambassador saddens us deeply, but we also understand and respect her choice.

"As an organisation, we are ashamed by the actions of some of our staff and are more committed now than ever to learn from our mistakes and ensure we uphold the highest levels of safeguarding standards in our work around the world."

Oxfam faces having tens of millions of pounds worth of taxpayers’ cash withdrawn amid growing anger at sexual misconduct claims against its staff.

International Development Secretary Penny Mordaunt told BBC1 ’s The Andrew Marr Show the alleged cover up of aid workers’ use of prostitutes in Haiti was "shocking".

She will meet the charity’s bosses to demand answers over the 2011 incidents.

Oxfam say they were saddened by her decision (Image: Reuters)

She said Oxfam had failed in its "moral leadership" over the "scandal".

And she warned: "If they don’t hand over all the information they have, then I can’t work with them any more."

Oxfam got £32million from her department last year.

The Charity Commission said Oxfam told of a misconduct probe on inappropriate sexual behaviour - but not potential sex crimes involving minors.

Oxfam said such claims are unproven. It announced new measures for the prevention and handling of sexual abuse cases.